When it broke out he joined an ambulance corps and served first in Flanders and then in the Argonne; he came back after a year with a red ribbon in his buttonhole and secured a position in the Red Cross in Paris.

先是在佛兰德斯服役， 然后在阿贡服役。 一年后，他的纽扣孔上系了一条红丝带， 他回来了，并在巴黎红十字会获得了一个职位。